Listed are all current movement mechanics known in Lightmatter, how to do them, and some tricks to make them easier.
DOUBLE/TRIPLE-JUMPING
Double jumping is a mechanic wherein a near-perfect jump input can be made in midair to get an extra jump. This can be done twice to get another jump on top of this, getting a triple jump.
This technique is 𝗻𝗼𝘁 𝗿𝗲𝗰𝗼𝗺𝗺𝗲𝗻𝗱𝗲𝗱 for a full RTA run of the game. After testing, it is completely random as to what frame you need to jump on in order to achieve a double or triple jump, and whilst your odds can be improved to get a higher chance of hitting one, it can't practically be pushed above ~70%. Believe me, an unreal amount of macros were used to test that, it's not currently possible.
In order to achieve a double jump, first set your framerate cap to 30fps. This option can be found in the pause menu: Settings -> Graphics -> Frame Rate -> 30. This is to maximise the time a double jump frame will last, as it is almost impossible to hit on anything higher than 30.
The recommended input for a double or triple jump is a consistent rhythm of three jump inputs. This should, with good timing, regularly guarantee you a triple jump, although you will still often miss. It is easiest to demonstrate with a video:
Successful jumps in that video are triples at 0:05, 0:13, a double at 0:25, triples at 0:27, 0:30, and 0:37.
You can also attempt to time it along with a metronome, striking at around 430BPM - although it's quite hard to track this way:
Again, it should be emphasised that trying to use this strategy for anything except a flex in a run is pretty much not feasible. It's hard, man.
Current main uses: Most IL runs Getting up sets of stairs faster - no need to deal with the slower walk speed up them or the slight movement speed decrease when you land from jumping up them. Skipping ledge grab animations
RAILGRINDING
Railgrinding is a technique wherein you can "grind" along thin slippery surfaces, like railings or the tracks for moving platforms, to get to places through routes never intended.
To execute a railgrind, walk onto a thin slippery surface and use A/D to balance yourself on top, whilst holding W to move forwards. It is easiest to occasionally tap one direction and stay on one side of the rail, rather than constantly swapping directions, as this requires less inputs.
You can jump into a railgrind so long as you counter the additional vertical momentum by pushing back really hard towards the rail when you land on it. You can also hold items whilst railgrinding, although you will not be able to pick them up or put them down.
A demonstration of railgrinding and jumping into railgrinding can be seen here, alongside a key display:
Many rails in the game are not easy to cross, however. This is because they have bumps in them, caused by cosmetic props that are there to make the rail seem like it's being held up by something. These will throw you violently in a pre-set direction, which is seemingly random per bump, which can be countered by going 𝘳𝘦𝘢𝘭𝘭𝘺 far on the rail in the other direction. Rails with bumps are incredibly hard to cross, and as such should realistically be reserved for IL runs only.
A demonstration of railgrinding a bumpy rail can be seen here, alongside a key display. One attempt manages to cross the first bump, seen at 1:00, with another at 1:22:
(TODO: Cleaner clip?)
If you'd like to practice railgrinding in-game, the best level is Level 36. Placing the lamp backwards on the moving platform and sending it across the gap lights up almost the entire rail, with a small black zone at the end. If you die by hitting that black zone, then congratulations - you have grinded one of the longest rails in the game!
If you'd like to practice railgrinding with bumps, the best level is Level 22. This level features lots of moving platform rails with bumps in them, including an incredibly technical rail immediately on the right when entering the second area which currently remains uncrossed.
Many objects in the game can be grinded outside of basic rails. Try different objects, and see what happens - so long as it's sloped, it should work! (Pictured - wall rail in Level 36)
Current main uses: Multiple IL Runs Level 26 Skip: https://www.speedrun.com/lightmatter/guide/4cdt5 (In future) Multiple Level 36 Leads:
